C#求水仙花数的算法实例，水仙花数的算法是一个三位数，每一位数的立方相加等于该数本身。清空listBox1控件，获取3位数中的后两位数。 -C# example of the algorithm seeking daffodils, narcissus algorithm is a three-digit number, each digit is equal to the sum of the cube of the number itself. Empty listBox1 contro